i guess they are saying "you hack and no rank for you" sort of thing and plus if you have the steam version then each mod has their own rank like if i was rank 15 in the normal version (without mods) then i get to keep my rank but if i used a hack in one mod like Paintball mod for COD 4 and i get rank 55 and that dont apply because they dont want hackers destorying the game (Well i guess they dont call this MPGH for nothing i guess)

I'm pretty sure things like Kill the King have Anti-Cheat based on the server and even if there was a way around that the main Anti-Cheat would still be in effect. Do some snooping around and i'm sure you'll find an answer.